When they stop using the underground railroad?

The Underground Railroad was primarily active during the mid-19th century, peaking in the 1850s. Its use declined significantly after the Civil War and the abolition of slavery in 1865 with the passage of the 13th Amendment. The network effectively ceased to exist as a formal system, as formerly enslaved individuals could no longer escape to freedom in the same way. However, the legacy of the Underground Railroad continues to resonate in discussions about civil rights and social justice.